Welcome to William B. Johnson
Here you will find those familiar blue instruments found in power plants, Navy ships and laboratories around the world. For over 50 years Johnson has been manufacturing the best radiation detection instruments in the world.
News!
Johnson is pleased to announce production of its new GSM-501 Micro-R meter. This instrument incorporates a tissue-equivalent plastic scintillator for better dose measurements. For more information click here.
How to use this web site:
In most situations you will need to purchase both an instrument AND a probe (detector). The quickest and easiest way to choose what you need is to go to the page corresponding to your applications. For example, most people are looking for basic set-ups to monitor radiation for safety purposes. Click on Radiation Safety to see the most common instrument combinations. There you can download and print specifications for the instrument and probe, if applicable. In some cases, you can click on a link to immediately purchase the instrument.
Other applications you can view are Emergency Response, Medical, and Nuclear Power.
Health Physics professionals may prefer to go straight to pages where you can look at individual Survey Meters, Probes or Portal Monitors.
As always, we welcome your inquiry by phone or email. Our knowledgeable staff are keen to help you make the right choice!